Cui, L., Zhang, L., Ma, H.-H., Wang, C.-J., Wang, D., Lian, H.-Y., Li, W.-J., Zhang, Q., Li, N., Wang, T.-Y., Li, Z.-G. and Zhang, R. (2020) “Circulating cell-free <i>BRAF</i&gt; V600E during chemotherapy is associated with prognosis of children with Langerhans cell histiocytosis”, Haematologica. Pavia, Italy, 105(9), pp. e444-e447. doi: 10.3324/haematol.2019.229187.